So, I had PowerDVD 8 (OEM) working without any problems using Bootcamp 3.1 and Windows 7 (64-bit). Now, I can't play any blu-rays because the program says my graphics card and display aren't HDCP compliant. They are, but some kind of update must have changed that status, either Windows update, ATI Catalyst graphics driver, or PowerDVD. I've also tried the full version of 10, so it's not an OEM version issue. Both give me the same error.
Does anyone know which driver/version a 2009 Core i7 27" iMac with a Radeon HD 4850 should be using under Windows 7 (64-bit)? I had it working before, but I can't remember what the right combination of files I used. Any help would be appreciated.